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8y+4y²+16y+16=4y²+12y-40
4y²+24y+16=4y²+12y-40
4y²-4y²+24y-12y=-40-16
12y=-56
y=-56/12
y= 4,6
2. (4y-3)²-7 = (8y+5) (2y-4)
16y²-24y+9-7=16y²-22y-20
16y²-16y²-24y+22y=-20-2
-2y=-22
y=-22/-2
y=11
maaf kalo salah ^^